﻿#region copyright
//<copyright>
// Copyright(C) 2012 TrackerRealm Corporation
// This file is part of the open source project - Jazz. http://jazz.codeplex.com
// 
// Jazz is open software: you can redistribute it and/or modify it 
// under the terms of the GNU Affero General Public License (AGPL) as published by 
// the Free Software Foundation, version 3 of the License.
// 
// Jazz is distributed in the hope that it will be useful, 
// but WITHOUT ANY WARRANTY; without even the implied warranty 
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
//  See the GNU Affero General Public License (AGPL) for more details.
// 
// You should have received a copy of the GNU General Public 
// License along with Jazz.  If not, see <http://www.gnu.org/licenses/>.
//
// REMOVAL OF THIS NOTICE IS VIOLATION OF THE COPYRIGHT. 
//</copyright>
#endregion
using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using TrackerRealm.Jazz.Common;

namespace TrackerRealm.Jazz.Client
{
    /// <summary>
    /// 
    /// </summary>
    public class CacheByType<U>: IEnumerable<U> where U : jClass
    {
        private Dictionary<Type, U> dict = new Dictionary<Type, U>();
        #region Add
        /// <summary>
        /// 
        /// </summary>
        /// <param name="unit"></param>
        internal void Add(U unit)
        {
            this.AddUnit(unit);
        }
        internal void AddPlaceHolder(Type t, U unit)
        {
            this.dict.Add(t, unit);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="unit"></param>
        private void AddUnit(U unit)
        {
            if (this.dict.ContainsKey(unit.JazzObjectType))
            {
                this.dict[unit.JazzObjectType] = unit;
            }
            else
                this.dict.Add(unit.JazzObjectType, unit);
            // creates entries for base objects such as 'jProfileBase'
            //if (unit.JazzObjectType.BaseType.IsAbstract && unit.JazzObjectType.BaseType != typeof(jObject))
            //{
            //    if (this.dict.ContainsKey(unit.JazzObjectType.BaseType))
            //    {
            //        this.dict[unit.JazzObjectType.BaseType] = unit;
            //    }
            //    else
            //        this.dict.Add(unit.JazzObjectType.BaseType, unit);
            //}
        }
        #endregion
        #region Contains
        /// <summary>
        /// Returns true if the dictionary contains the type 't'.
        /// </summary>
        /// <param name="t"></param>
        /// <returns></returns>
        public bool Contains(Type t)
        {
            return this.dict.ContainsKey(t);
        }
        #endregion
        #region Remove
        /// <summary>
        /// 
        /// </summary>
        /// <param name="unit"></param>
        internal void Remove(U unit)
        {
            this.dict.Remove(unit.JazzObjectType);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="unit"></param>
        internal bool TryRemove(U unit)
        {
            if (!this.dict.ContainsKey(unit.JazzObjectType))
                return false;
            return dict.Remove(unit.JazzObjectType);
        }
        #endregion
        /// <summary>
        /// 
        /// </summary>
        /// <param name="jworkflowType"></param>
        /// <param name="jclass"></param>
        /// <returns></returns>
        public bool TryGet(Type jworkflowType, out U jclass)
        {
            return this.dict.TryGetValue(jworkflowType, out jclass);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="jworkflowType"></param>
        /// <returns></returns>
        public U Get(Type jworkflowType)
        {
            return this.dict[jworkflowType];
        }
        #region Clear
        /// <summary>
        /// 
        /// </summary>
        internal void Clear()
        {
            dict.Clear();
        }
        #endregion

        #region IEnumerable<U> Members

        IEnumerator<U> IEnumerable<U>.GetEnumerator()
        {
            return this.dict.Values.GetEnumerator();
        }

        #endregion

        #region IEnumerable Members

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        {
            return this.dict.Values.GetEnumerator();
        }

        #endregion
        #region
        /// <summary>
        /// 
        /// </summary>
        public int Count
        {
            get { return this.dict.Count; }
        }
        #endregion
    }
}
